PHP infinite loop to get MySQL data-PHP Tutorial-php.cn

This article mainly introduces the method of obtaining MySQL data in PHP infinite loop. Interested friends can refer to it. I hope it will be helpful to everyone.

The details are as follows:

public function get_data($limit){ $sql="select * from ((select id,name from `mytable` limit {$limit},10) union all (select id,name from `mytable` limit 0,10)) as test limit 0,10"; 　　 return $this->query($sql); }

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The above sql statement uses the union all method of mysql to splice the two sets together and take the first ten data.

public function getCount(){//获取数据的条数 $sql="select count(id) as t from `mytable`"; return $this->query($sql); }

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The next step is to obtain the data in the controller and provide a data interface to ajax.

//测试数据库无限循环取数据 public function getInfiniteData(){ //用户点击数 $page = $_GET['click']; 　　　　 //每次展示条数 $pagesize = 10; 　　　　　//获取总条数 $total = $this->Mydemo->get_count(); $t = $total[0][0]['t']; 　　　　　//算出每次点击的其起始位置 $limit = (($page - 1)*$pagesize)%$t; $data = $this->Mydemo->get_data($limit); if (!empty($data)) { //转换为二维数组 $list = []; foreach ($data as $key => $v) { $list[$key] = $data[$key][0]; } $info['msg'] = $list; $info['code'] = '001'; }else{ $info['code'] = '002'; $info['msg'] = '暂无数据'; } echo json_encode($info,JSON_UNESCAPED_UNICODE);die; }

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